[#168808917] Fix bug: Unable to drop attribute in graph
[#168808917] Fix bug: Unable to drop attribute in graph

* Bug was consequence of changes to case table. Case table scroll region
  was being miscalculated do to a _fix_ to HierarchicalTableView.frameSize
  property.
* Removed the frameSize property, since it no longer appears necessary.

concord-consortium/codap,concord-consortium/codap,concord-consortium/codap,concord-consortium/codap,concord-consortium/codap